What kind of valve is this?
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As shown in the figure, what kind of valve is this, and why are there two cylinders?
The pressure is too high; the single nozzle cannot handle it, and only by connecting multiple nozzles together can it function~~~~~~~
Straight-stroke control valve; the difference is that the pressure difference actuator consists of two elements connected in series
Double-diaphragm control valve, which increases the output force of the control valve.
How did it rust like this? Is it a problem with the painting? The on-site environment is still severely corrosive.